DE2221050A1 - Beading machine - Google Patents

Description

Applicant: The Weatherhead Company, 300 East 131 Street, Cleveland, Ohio 44108, USA

Sick ma s ch ine

The invention relates to a fastening machine of sleeves on tubular members which are inserted into the sleeves, in particular for carrying out a method in which the Attachment is effected by a radial deformation of the sleeve. The invention relates in particular to a beading machine with which metallic fittings can be attached to flexible hoses.

When attaching metallic fittings to flexible hose, it is important that the assembled unit at least as strong as the hose itself to avoid leakage or disconnection under high pressure or vacuum. Such Fittings usually include a fitting that fits into the Hose fits, as well as a sleeve that fits on the outside of the hose. The sleeve is radially inward through a Beading machine, punching machine or the like deformed in order to secure the hose between the two walls.

Stamping and beading machines for attaching such fittings usually exert an axial force on one end of the sleeve to

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this by an annular outer tool with a smaller diameter than to press its outer wall, whereby the outer wall is pressed radially inward for attachment to the hose. Even though Such beading machines work satisfactorily when the sleeves have a smaller diameter, larger ones exist Diameters of the sleeves, the difficulty that by the axial force / to push the sleeve through the outer tool it is necessary to be able to form folds running transversely to the beads. To avoid these difficulties, you have to either the diameter of the outer wall successively in two or more Tools are reduced, or the outer wall must have a greater wall thickness than for the purpose in question is required. Although both options can prevent such cross folds, the disadvantage still remains that either additional work processes or increased material costs have to be accepted.

Beading machines for attaching fittings to flexible hoses have numerous differences in construction and mode of operation, but generally contain a number of adapted, individual beading fingers that radially follow be moved inside to effect the indentation. Although suitably formed beads are produced by known beading machines there are nevertheless certain disadvantages. Such machines are relatively complex and expensive. Furthermore, a relatively long labor time is required when the sleeves are larger or the range of sleeve sizes is changed shall be. Furthermore, beaded fingers of such machines have to be quite Can be opened wide so that larger fittings such as KnL - pieces can be passed through, which is why such machines are relatively large and complicated.

These disadvantages are of particular importance when the machines are used at different locations should. The fastening of the fittings at a special workstation is usually carried out so that there is a piece of tubing the required length can be fed from a large supply roll with the required end piece, without the previously supplied

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cut lengths of tubing of any tubing size with various combinations of end pieces attached have to. Machines at locations outside of a manufacturing plant should therefore enable suitable fittings to be used on a wide variety of To be able to attach hose sizes without the need for lengthy machine adjustment, if another Sleeve size is required, and without requiring expensive equipment for each size.

It is therefore an object of the invention, while avoiding the disadvantages and difficulties mentioned, a beading machine of to train initially mentioned type so that they can be used in both manufacturing plants can also be used at other workplaces and can be easily and quickly adapted to different sizes made possible without transverse folds of the type mentioned or excessive wall thicknesses of the sleeves having to be accepted.

In a beading machine of the type mentioned at the outset, this object is achieved by the subject matter of the invention in that that the beading tool is divided in the longitudinal direction into at least two separate sections, each of which is a number which has push-in elements, and in that each of the sections is individually removable from the base guide. The main features the invention can therefore be seen in a beading machine in which the beading tool is designed as a clamping sleeve, which is divided into two semicircular sections, each of which has a number of beaded fingers, which are in axial Direction from a base part. The beaded fingers have internal push-in elements that form part of a circular Form die. A conical outer surface on the beading tool is pressed into a conical base guide, around the To press compression elements in the radial direction against the sleeve. The beading tool is operated by a stamp, which has a slotted side wall so that any lugs on the sleeve are not damaged. To remove the With a piece of hose provided with an end piece, these segments can be separated.

In the subject of the application, a number of beaded fingers are therefore provided, which are connected to one another at one end.

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which have a conical outer surface and inner indentation elements at the other end. The inner impression elements of each Fingers define a circular die in which the sleeve and hose are placed. Each indentation element will then pressed radially inward by a relative axial movement between the outer surface of the beading tool and the base guide, to close the cavity and press in the beads.

According to a further feature of the invention, a ram is provided through which a uniform pressure is exerted can be to press the beading tool into the base guide without protruding extensions can be deformed. .

In the preferred embodiment of the invention is a beading tool in the form of a clamping sleeve with a number of Fingers provided, which are connected by a common base part at one end of the beading tool. Every finger points one Spring part which extends from the common base to a free end of the beading tool. At the free end of the beading tool each finger is provided with an enlarged part with an inner push-in element and a conical outer surface. The push-in elements delimit a cavity in which the sleeve is arranged. The conical outer surface of the beading tool vöird then pushed into the base guide to the push-in elements advance radially inward to close the cavity in order to press in the beads.

Although a one-piece beading tool can also be provided, according to the preferred embodiment, an in two cooperating sections subdivided clamping sleeve provided, which are designed accordingly and approximately a semicircular Have cross-section. By dividing the beading tool into two sections, the sleeve can be easily inserted and can be removed without opening the mold cavity too wide, even if the tubular member is at the other end with another sleeve is provided. Therefore, the machine can be made much smaller than would otherwise be necessary

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would be if the mold cavity had to be opened wide to allow for the removal to enable sleeves that have protruding approaches. Furthermore, the operator only has to work with two sections of the beading tool, although any desired number of independent indenters can be provided to to ensure uniform deformation of the sleeve.

Appropriately, the axial force is used to actuate the Beading tool exercised by a substantially cylindrical ram, the side wall of which is provided with a recess so that an extension on the sleeve, e.g. can be. As a result, a smaller diameter of the ram is also possible, compared to a no recess having hollow ram with a larger inner diameter, while a uniform application of force on the beading tool remains guaranteed.

The invention will be explained in more detail using an exemplary embodiment shown in the drawing. Show it:

Fig. 1 is a partially sectioned side view of a beading machine according to the invention;

FIG. 2 shows a partial section corresponding to FIG. 1 after a press impact of the press die;

3 shows a plan view of an arrangement device for the sleeve in the beading machine in FIG. 1;

Fig. 4 is a sectional view of another assembly device for the machine in Fig. 1;

Fig. 5 is a side view of a portion of the beading tool in Fig. 1; and

6 shows a plan view of the divided beading tool for the beading machine in FIG. 1, in the closed position of the tool.

In the illustrated in Fig. 1 Ausführungsbexspxel a beading machine according to the invention, the vertical movement of the ram with the help of a base guide in a radial

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Displacement of the indentation elements converted to beads in a Press the sleeve onto a tubular member. The machine can be used for beading any sleeves, for example for connecting electrical lines or for fastening sleeve-shaped casings, although the exemplary embodiment relates to the attachment of metallic end pieces to a flexible hose.

The press ram is actuated by a hydraulic one An engine 10 which includes a cylinder 11 in which a piston is arranged. The engine 10 is on an upper support plate 12 attached to the machine by bolts 13 and end plates 14. The upper support plate 12 is connected to a base plate 15 through brackets 16 connected, which keep the plates in a precisely aligned position. An electric motor 21 is used to drive a hydraulic one Pump 22, which pressure medium from a reservoir 24 to a Four-way valve 23 promotes. The valve 23 selectively connects one of the chambers of the engine 10 to that pressurized by the pump 22 Pressure medium, and the other chamber with the reservoir 24 to move the piston in the cylinder 11.

The piston of the motor 10 is connected to a piston rod 28 to move the ram in one direction or the other Dependency · on the controller by moving the valve. The ram 29 is essentially cylindrical and has a closed end 30 which is screwed to the piston rod 28 and an opposite open end. The ram 29 also has a recess 31 in its side wall, as will be explained in more detail below.

The base guide 35, which is designed with a conical inner wall, is precisely aligned on the base plate 15 with respect to the ram 29 attached. The base guide 35 has a bore 36 from which one end of a bore 37 opens through the base plate 15. The other end of the bore 36 extends to the conical inner surface 39, which enables the radial displacement of the push-in elements. Although in the preferred embodiment a conical inner surface is provided to accommodate the radial displacement of the

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To enable push-in elements, some other training find a guide device use.

The sleeve is pressed in by a beading tool 41 in the form of a clamping sleeve. The beading tool 41 has cooperating Fingers 43 which are connected by a common base part 44 at one end and extend downward therefrom. A spring member 45 extends from the base member 44 to an enlarged free end of the fingers 43. The free end of each finger 43 is provided with a push-in element 48, which is connected to the push-in elements of the other fingers 43 of the beading tool 41 cooperates to define a substantially Krexsförmxgen mold cavity 49 (Fig. 6). The mold cavity 49 can through a radial adjustment of the fingers 43 for pressing in or releasing the sleeve can be closed or opened, as later should be explained in more detail. The free end of each resilient finger 43 is also provided with a conical outer surface 51, which cooperates with the conical inner surface 39 of the socket guide 35 to open the mold cavity 49 or to conclude.

In the preferred embodiment, the beading tool 41 is in two practically identically formed separate sections 50 divided, which have an approximately semicircular cross-section, and one of which is shown in FIG. In this way the sleeve can simply be placed in the mold cavity 49 or removed therefrom without the mold cavity 49 in particular must be opened wide, as will be explained in more detail in connection with the operation of the machine. Although with the preferred Embodiment the beading tool 41 is divided into two semicircular sections 50, the beading tool 41 can be divided into a desired number of sections, each of which extends along a desired peripheral portion of the tool 41 extends.

Around a sleeve in a suitable axial position in the mold cavity 49, an arrangement device 53 is provided, as shown in FIGS. 1, 2 and 3. The sleeve 54, which is to be attached to the hose 55 is to be

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piece 56 connected. The arranging device 53 has a cylindrical shape Member with a shoulder 59 on which a peripheral portion of the Hexagon 60 of the elbow 56 rests in order to ensure an exact axial arrangement of the sleeve 54 in the mold cavity 49. the Locator 53 is also provided with a slotted portion for receiving the radially extending portion of the elbow 56 provided. The two cooperating set screws 62 ensure that the sleeve 54 and its elbow 56 during the Not being postponed. To work faster To enable, these adjusting screws 62 can also be replaced by spring-loaded ball stops.

Since various types of extension pieces such as elbows and T-pieces can be provided on the sleeves, it may be necessary to different embodiments of arrangement devices to use. Although the arrangement device 53 is suitable for connecting pieces with enlarged ones in contact with the shoulder 59 To arrange flange parts or the like, which for example have the shape of a hexagon 60, can be protruding on other sleeves Parts are provided that do not allow a suitable system. In the case of sleeves of this type, the arrangement device shown in FIG 66 find use. This arrangement device 66 has a substantially tubular body 67 which has a threaded portion 68 has into which a plug 69 is screwed. Fittings without a flanged part for an aligning Stop, such as, for example, the elongated connecting piece 70, are inserted into the arrangement device 66 in such a way that its upper side engages plug 69 to allow alignment. The adjusting screws 71, which are also supported by ball stops can be replaced under spring tension, are used to hold the connecting piece 70 in the arrangement device. The stopper 69 has a hexagon socket to allow axial adjustment. The set screw 72 is used to anchor the plug 69 in a suitable location.

The operation of the beading machine will be explained in more detail below. The sleeve to be fastened is

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Arranged arrangement device, for example in the arrangement device 53 or 66. The sleeve 54 is then in the beading tool 41 is inserted into the mold cavity 49 if the beading tool is formed in one piece, or the sections 50 are around the sleeve arranged when the beading tool is divided. A ring plate 75 with an opening 76 is placed on top of the sinking tool 41 arranged in order to ensure an even exertion of force on all fingers 43. Although the ring plate 75 in the Preferred exemplary embodiment is arranged between the arrangement device 53 and the beading tool 41, the bore 76 be made so large that the arrangement device 53 rests directly on the top of the beading tool 41. Preferably However, the bore 76 is as small as possible in order to approximate the diameter of the mold cavity 49 and a uniform axial To ensure force exertion along the end face of the beading tool 41.

When the ram 29 is in its retracted position in Fig. 1, the in the beading tool 41 by the Arrangement device 53 arranged in the base guide 35 aligned sleeve. The hose 55 is then pushed into the sleeve 54 and held there by frictional forces between the hose and the sleeve.

Factors such as the size of the sleeve 54 and tube 55, the distance under the base plate 15, the space above the base guide 35 when the ram 29 is retracted and the space A number of sections 50 may require that the sleeve 54 be positioned in the mold cavity 49 other than as described above. For example, it may be easier to arrange the sleeve 54 in the mold cavity 49 after the beading tool 41 is in the base guide 35 was ordered. In the preferred embodiment, the free inner diameter of the mold cavity 49 is the Beading tool 41 larger than the outer diameter of the sleeve 54 in the undeformed state, so that this can be done. Depending on the length, diameter and flexibility of the hose 55, it may be easier to place the hose 55 in the sleeve 54, before the sleeve 54 is placed in the mold cavity.

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When the sleeve 54 is properly positioned in the mold cavity 49 and the beading tool 41 is arranged on the conical guide surface 39 of the base guide 35, the valve 23 is to the upper Chamber of the hydraulic motor 10 to supply pressure medium under pressure, and to connect the lower chamber of the motor 10 to the reservoir 24, actuated. This causes the piston of the motor 10 down in Fig. ' 1 is moved to the piston rod 28 and to move the ram 29 against the base guide 35. When advancing the ram 29 ensures the slotted Part 31 a clearance for the knee 56, so that the ram 29 have a space-saving smaller diameter can and enables a more uniform axial exertion of force on the end face of the beading tool 41. The ring plate 75 ensures an even more uniform distribution of the axial force along the end face of the beading tool 41, including that part under the recess 31 on the press ram 29.

When the ram 29 touches the ring plate 75 and that Beading tool 41 is advanced into the conical interior of the base guide 35, the resilient fingers 43 are radially inward pressed to close the mold cavity 49, so that the pressing elements 43 press the sleeve 54 onto the hose 55. The mechanical force amplification between the press ram 29 axial force exerted and the radial push-in force exerted on the push-in members 43 is determined by the inclination angle 77 of the mutually engaging guide surfaces 39 and 51 certainly. The selection of this angle depends on the specific application of the beading machine and is in the preferred one Embodiment about 15, in order to achieve a force amplification about in the ratio of 4: 1.

The extent of the radial displacement of the fingers depends on the axial displacement for a certain angle of inclination 77 of the beading tool 41 into the base guide 3 5. In the preferred embodiment, the axial displacement of the sinking tool 41 is controlled by attacking the underside of the ring plate 75 on the upper side of the base guide 35. This results in an inevitable stop to control the deformation

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of the sleeve 54, as best seen in Fig. 2 / where the The ram 29 is in its front end position, the ring plate 75 resting against the base guide 35 = when in Fig. 2 shown position of the ram 29 is the beading tool 41 in the fully closed position, as in Fig. 6 is shown. In this completely closed position there is a small space between adjacent fingers 43, in order to free a gap for the parts of the sleeve 54

the
let them lie between adjacent indentation elements and should not be deformed.

After the sleeve 54 has been pressed in in the manner described, the valve 23 is actuated to open the upper chamber of the motor 10 to the reservoir 24 and to connect the lower chamber of the motor 10 with pressure medium from the pump 22. This will make the The ram 29 is retracted into the position shown in FIG. 1, so that the radially outwardly directed spring force caused by the Spring members 45 is exerted, the beading tool 41 lifts from the base guide 35 to open the mold cavity 49 and the removal the sleeve 54 to enable. If the beading tool is not divided, or if there is no sleeve or another enlarged one Link is present at the other end of the hose 55, the sleeve can simply be removed from the beading tool, without this being removed from the base guide 35. However, if the beading tool is divided in the manner described above and the free open diameter of the beading tool does not allow the sleeve to be removed, the entire beading tool can 41 with the sleeve 54 can be easily removed from the base guide 35. After that, the sections 50 without Difficulty being removed from the sleeve 54.

In the case of the subdivided beading tool, the fingers do not have to be opened far enough for an extension piece to pass through at the other end of the hose 55, which can be an elbow or other large extension. The machine can be made small enough that it can be transported as a portable unit to any workstation. Furthermore, the Machine can be easily adapted to the fastening of sleeves and

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To enable different sizes, in-that the beading tool 41 is exchanged. If significantly different sizes of sleeves are required, both the base guide 35 and the sinking tool 41 are exchanged. Furthermore, the power amplification of the system can be changed in a simple manner _(in order to achieve the required push-in force for different sleeves by changing the angle of inclination 77.

Claims

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Claims (6)

Godfather s test before 1. Beading machine with a beading tool arranged in a base guide, with a device for causing a relative axial movement between the beading tool and the base guide, which beading tool has a number of push-in elements with spring members, which the push-in elements in radial outside predetermined positions when the sinking tool and the base guide are in a first position with the insides of the push-in members providing a mold cavity Recording of the workpiece and its deformation during a relative movement of the beading tool and the base guide at a Have relative movement from the first to a second position of the beading tool and base guide, and wherein the spring members a radially inward displacement of the push-in elements from the radially outer position during the relative displacement enable the beading tool and the base guide in the second position, characterized in that the Beading tool (41) is divided in the longitudinal direction into at least two separate sections (50) that each of the sections has several Has push-in elements (48), and that the sections (50) are individually removable from the base guide (35). 2. beading machine according to claim 1, characterized in that the finger elements (43) are each semicircular are trained. 3. beading machine according to claim 1, characterized in that that the elasticity of the deformed spring members (45) of each of the sections (50) is the only force for movement of the sections in an axial direction from the socket guide (35) and for returning the push-in elements to the radially outer position. 4. beading machine according to claim 1, characterized in that that each of the sections (50) has a base part 20 9 8 45/0930 (44) has that each of the spring members (45) has an elongated elastic part which is rigidly connected to one end of the Exndruckelemente (48) and is connected to the base part, and that the pressing elements of each section have conical outer surfaces (51), which are adapted to the conical inner surface (39) of the base guide (35). 5. beading machine according to claim 1, characterized in that that the device for exerting force has a hollow cylindrical press ram (29) through an axial force can be exerted on each of the sections, and that the press ram has a side wall with a recess (31) for Receiving a radially projecting extension piece (56) of the workpiece. 6. beading machine according to claim 1, characterized by a resilient beading tool (41), a base guide (3 5), a device £ 10, 28, 29) for generating a relative axial Movement between the beading tool and the base guide, which beading tool has a base part (44) and a number of spring-loaded Fingers (43, 45), each of the resilient fingers having an enlarged end (43) and a resilient part (45) which connects the enlarged end to the base part, the enlarged ends each having an inner surface (48) and an outer surface (51), which inner surfaces each with a push-in element (48) and which outer surfaces each a conical surface (51), which indentation elements have a substantially circular mold cavity for receiving of a workpiece and to limit its deformation, which resilient Parts are each rigidly connected to the base part and its associated end part, normally around the push-in elements in a radially outward position to open the mold cavity, which base guide has a conical inner surface for receiving the conical outer surface of the fingers in order to press the push-in elements radially inwards and the resilient ones Bend parts into a bent position and the mold cavity with a relative axial movement of the beading tool 2098 ^ 5/0930 and to close the base guide, the elasticity of the bent resilient parts deliver a radial force in order to open the push-in elements in the radially outer position of the mold cavity, wherein the beading tool (41) is divided in the longitudinal direction into at least two separate sections (50) is, wherein each of the sections (50) has a number of resilient fingers (45), and wherein each of the sections (50) can be individually removed from the base guide (35). 2098-5 / 0930